Manufacture of paper.



UNITED STATES PATENT OFFICE.

WILBUR T. ARMISTEAD, OF RICHMOND, VIRGINIA, ASSIGNOR OF ONE-HALF TONATHAN B. BACON, OF RICHMOND, VIRGINIA.

MANUFACTURE OF PAPER.

STPEOIFIGATION forming part of Letters Patent No. 719,982, datedFebruary 10, 1903. Application filed June 18, 1902. Serial No. 112,213.(No specimens.)

To a. whom it may concern:

Beit known that I, WILBUR T. ARMISTEAD, a citizen of the United States,residing at Richmond, in the county of Henrico and State of Virginia,have invented certain new and useful Improvements in the Manufacture ofPaper; andI do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledIO in the art to which it appertains to make and use the same.

My invention relates to the manufacture of paper from cotton-seed hulls;and its principal object is to produce a grade of paper I 5 particularlyadapted for roofing and building purposes, lining for boxes, cases, andpacking purposes generally.

Another object of the invention is the production of a grade of paper ofthe class stated superior in quality to that now in use and which can bemanufactured at a much less cost.

Heretofore attempts have been made to manufacture high-grade papers fromcotton- 2 5 seed hulls; but all such attempts have proved failures fromone cause or another. By my process the product is easily convertibleinto paper of the grade named and can be economically produced, owing tothe great abundance and cheapness of cotton-seed hulls.

In carrying out my invention the cottonseed hulls are placed in asuitable tank or boiler and boiled in the presence of an alkalinesolution under a sufficient pressure of steam until the hulls aresoftened and the oily'substance neutralized, so that uniformity ofcoloris obtained. After boiling a sufficient length of time the mass istransferred to the beating and refining engines, washed,

0 and when sufficiently beaten the pulp is passed to the stud-chest,from which it is pumped to the making-cylinder vat. It will beunderstood that during these steps in the process the mass must atalltimes be kept in a heated condition, in which case the small amountof grease or oil remaining in the cotton-seed hullsand fiber will nottend to retard its manufacture into the grades of paper hereinbeforementioned. The mass may be kept heated by means of a supply of steam toeach one of the several receptacles through which it is passed.

Other processes may be employed for obtaining my improved product; but Iprefer to use the one above described, as it can be more expeditiouslyand economically practiced, and it will be found that uniformity anddistinctiveness of color is obtained.

In producing my product I prefer to use the entire hull, with the fiberattached, after all of the oil possible has been extracted. If a specialquality of paper is required, other paper-stock or raw fiber may bemixed with the cotton-seed hulls.

For some purposes it is important that the paper be capable ofabsorption, so that it will readily take up and absorb varioussolutions, such as tar, pitch, 850. As my product is of ahighly-absorbent character, it will take up such solutions in quantityabout equal to its own weight, and I propose for the purpose ofproducingslaters and other felt papers to saturate the product with asolution of tar.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is-

1. As a new product, an absorbent paper or board made from cotton-seedhulls,chemically cooked, then ground to a pulp and having the minuteparticles of the hulls distributed throughout the body of the paper, soas to impart a uniform tint thereto.

2. As a new article of manufacture, an absorbent paper or board producedfrom the hulls of cotton-seed boiled in the presence of an alkalinesolution, under a pressure of steam, then ground to a pulp and havingthe minute particles of the hulls uniformly distributed throughout thebody of the paper, so as to impart a uniform tint thereto. 0

8. As a new article of manufacture, a felt paper or board produced fromthe hulls of cotton-seed boiled in the presence of an alkaline solution,under a pressure of steam, then ground to a pulp, and saturated with asolu- 5 tion of tar.

In testimony whereof I affix my signature in the presence of twowitnesses.

WILBUR T. ARMISTEAD.

Witnesses:

ADA S. ORUMP, JAMES F. RYLAND.

